This pile of rock and stone is what remains of the once Broch (Dun means a fort) at Bragar on the West side of Lewis. This Broch like many on the island is situated at the edge of a loch (lake) possibly for defense, and it was linked to the land by a man made under water causeway. This Broch like many others would have possibly dated to before the Viking age of 800 AD onwards and would have had intermittent occupation throughout the centuries. Brochs are sometimes defined as being a complex class of roundhouse buildings found throughout and only unique to "Atlantic Scotland".